Major Challenges and Required Modifications:
* Engine Mounts: The V6 and V8 have different engine mount locations. You'll need custom engine mounts fabricated or purchase aftermarket mounts designed for this swap.
* Transmission: Your 5-speed manual transmission likely won't work with the V8. The bellhousing bolt pattern is different. You'll need a transmission compatible with the V8, likely a T56 (6-speed) or a properly adapted Tremec. This involves a new transmission, bellhousing, clutch, flywheel, driveshaft, and potentially the crossmember.
* Exhaust System: The V6 exhaust system won't work. You'll need a custom exhaust system made for the V8, including headers.
* Wiring Harness: The V6 wiring harness is incompatible. You'll need a V8 harness or custom wiring, which can be extremely complex. This usually requires extensive knowledge of automotive electrical systems.
* Cooling System: The V8 produces significantly more heat. You might need a larger radiator, upgraded cooling fan, and potentially an electric fan for sufficient cooling.
* Driveshaft: The driveshaft needs to be modified or replaced to accommodate the V8 and the new transmission.
* Computer/ECU: The V6's computer won't work with the V8. You'll likely need a standalone engine management system or an appropriate ECM from a car that originally used that V8. Tuning will be necessary.
* Brakes: The increased power of the V8 might necessitate upgraded brakes for safer stopping.
* Possibly the K-member: Depending on the specific V8 and transmission combination, you might need to modify or replace the K-member (front suspension support) to provide adequate clearance.
In short: This is a major project requiring significant mechanical and electrical knowledge, or access to experienced mechanics. You'll likely need to invest considerable time, money, and potentially specialized tools. It's not something a novice should attempt. Many custom parts will likely be necessary. It is very highly recommended that you seek out a professional shop specializing in performance car modifications for such a project.
